锘??xml version="1.0" encoding="utf-8" standalone="yes"?>久久综合久久综合久久,91久久九九无码成人网站 , 久久综合狠狠综合久久激情 http://www.shnenglu.com/beautykingdom/category/7624.htmlzh-cnMon, 21 Jul 2008 02:12:25 GMTMon, 21 Jul 2008 02:12:25 GMT60緙栬瘧鍣?lt;杞?gt;http://www.shnenglu.com/beautykingdom/archive/2008/07/21/56722.htmlchatlerchatlerMon, 21 Jul 2008 00:57:00 GMThttp://www.shnenglu.com/beautykingdom/archive/2008/07/21/56722.htmlhttp://www.shnenglu.com/beautykingdom/comments/56722.htmlhttp://www.shnenglu.com/beautykingdom/archive/2008/07/21/56722.html#Feedback0http://www.shnenglu.com/beautykingdom/comments/commentRss/56722.htmlhttp://www.shnenglu.com/beautykingdom/services/trackbacks/56722.html緙栬瘧鍣紝鏄皢渚夸簬鎴戜滑緙栧啓錛岄槄璇伙紝緇存姢鐨勯珮綰ц綆楁満璇█緲昏瘧涓鴻綆楁満鑳借瘑鍒紝榪愯鐨勪綆綰ф満鍣ㄨ璦鐨勭▼搴忋傜紪璇戝櫒灝嗘簮紼嬪簭錛?/span>Source program錛変綔涓鴻緭鍏ワ紝緲昏瘧浜х敓浣跨敤鐩爣璇█錛?/span>Target language錛夌殑絳変環紼嬪簭銆傛簮紼嬪簭涓鑸負楂樼駭璇█錛?/span>High-level language錛夛紝濡?/span>Pascal錛?/span>C++絳夛紝鑰岀洰鏍囪璦鍒欐槸姹囩紪璇█鎴栫洰鏍囨満鍣ㄧ殑鐩爣浠g爜錛?/span>Object code錛夛紝鏈夋椂涔熺О浣滄満鍣ㄤ唬鐮侊紙Machine code錛夈?/span>

涓涓幇浠g紪璇戝櫒鐨勪富瑕佸伐浣滄祦紼嬪涓嬶細
婧愮▼搴忥紙source code錛?#8594;棰勫鐞嗗櫒錛?/span>preprocessor錛?#8594;緙栬瘧鍣紙compiler錛?#8594;姹囩紪紼嬪簭錛?/span>assembler錛?#8594;鐩爣紼嬪簭錛?/span>object code錛?#8594;榪炴帴鍣紙閾炬帴鍣紝Linker錛?#8594;鍙墽琛岀▼搴忥紙executables錛?/span>
 
宸ヤ綔鍘熺悊
 
緲? 璇戞槸浠庢簮浠g爜錛堥氬父涓洪珮綰ц璦錛夊埌鑳界洿鎺ヨ璁$畻鏈烘垨铏氭嫙鏈烘墽琛岀殑鐩爣浠g爜錛堥氬父涓轟綆綰ц璦鎴栨満鍣ㄨ█錛夈傜劧鑰岋紝涔熷瓨鍦ㄤ粠浣庣駭璇█鍒伴珮綰ц璦鐨勭紪璇戝櫒錛岃繖綾葷紪 璇戝櫒涓敤鏉ヤ粠鐢遍珮綰ц璦鐢熸垚鐨勪綆綰ц璦浠g爜閲嶆柊鐢熸垚楂樼駭璇█浠g爜鐨勫張琚彨鍋氬弽緙栬瘧鍣ㄣ備篃鏈変粠涓縐嶉珮綰ц璦鐢熸垚鍙︿竴縐嶉珮綰ц璦鐨勭紪璇戝櫒錛屾垨鑰呯敓鎴愪竴縐嶉渶瑕佽繘 涓姝ュ鐞嗙殑鐨勪腑闂翠唬鐮佺殑緙栬瘧鍣紙鍙堝彨綰ц仈錛夈?/span>

 
鍏稿瀷鐨勭紪璇戝櫒杈撳嚭鏄敱鍖呭惈鍏ュ彛鐐圭殑鍚嶅瓧鍜屽湴鍧浠ュ強澶栭儴璋冪敤鐨勬満鍣ㄤ唬鐮佹墍緇勬垚鐨勭洰鏍囨枃浠躲備竴緇勭洰鏍囨枃浠訛紝涓嶅繀鏄悓涓緙栬瘧鍣ㄤ駭鐢燂紝浣嗕嬌鐢ㄧ殑緙栬瘧鍣ㄥ繀闇閲囩敤鍚屾牱鐨勮緭鍑烘牸寮忥紝鍙互閾炬帴鍦ㄤ竴璧峰茍鐢熸垚鍙互鐢辯敤鎴風洿鎺ユ墽琛岀殑鍙墽琛岀▼搴忋?/span>

緙栬瘧鍣ㄧ綾?/span>
 
緙? 璇戝櫒鍙互鐢熸垚鐢ㄦ潵鍦ㄤ笌緙栬瘧鍣ㄦ湰韜墍鍦ㄧ殑璁$畻鏈哄拰鎿嶄綔緋葷粺錛堝鉤鍙幫級鐩稿悓鐨勭幆澧冧笅榪愯鐨勭洰鏍囦唬鐮侊紝榪欑緙栬瘧鍣ㄥ張鍙仛“鏈湴”緙栬瘧鍣ㄣ傚彟澶栵紝緙栬瘧鍣ㄤ篃鍙互鐢熸垚鐢? 鏉ュ湪鍏跺畠騫沖彴涓婅繍琛岀殑鐩爣浠g爜錛岃繖縐嶇紪璇戝櫒鍙堝彨鍋氫氦鍙夌紪璇戝櫒銆備氦鍙夌紪璇戝櫒鍦ㄧ敓鎴愭柊鐨勭‖浠跺鉤鍙版椂闈炲父鏈夌敤銆?#8220;婧愮爜鍒版簮鐮佺紪璇戝櫒”鏄寚鐢ㄤ竴縐嶉珮綰ц璦浣滀負杈? 鍏ワ紝杈撳嚭涔熸槸楂樼駭璇█鐨勭紪璇戝櫒銆備緥濡?/span>: 鑷姩騫惰鍖栫紪璇戝櫒緇忓父閲囩敤涓縐嶉珮綰ц璦浣滀負杈撳叆錛岃漿鎹㈠叾涓殑浠g爜錛屽茍鐢ㄥ茍琛屼唬鐮佹敞閲婂瀹冭繘琛屾敞閲婏紙濡?/span>OpenMP錛夋垨鑰呯敤璇█鏋勯犺繘琛屾敞閲婏紙濡?/span>FORTRAN鐨?/span>DOALL鎸囦護錛夈?/span>

棰勫鐞嗗櫒錛?/span>preprocessor錛?/span>
 
浣滅敤鏄氳繃浠e叆棰勫畾涔夌瓑紼嬪簭孌靛皢婧愮▼搴忚ˉ鍏呭畬鏁淬?/span>

緙栬瘧鍣ㄥ墠绔紙frontend錛?/span>
 
鍓嶇涓昏璐熻矗瑙f瀽錛?/span>parse錛夎緭鍏ョ殑婧愮▼搴忥紝鐢辮瘝娉曞垎鏋愬櫒鍜岃娉曞垎鏋愬櫒鍗忓悓宸ヤ綔銆傝瘝娉曞垎鏋愬櫒璐熻矗鎶婃簮紼嬪簭涓殑‘鍗曡瘝’錛?/span>Token錛夋壘鍑烘潵,璇硶鍒嗘瀽鍣ㄦ妸榪欎簺鍒嗘暎鐨勫崟璇嶆寜棰勫厛瀹氫箟濂界殑璇硶緇勮鎴愭湁鎰忎箟鐨勮〃杈懼紡錛岃鍙?/span>錛屽嚱鏁扮瓑絳夈?/span>渚嬪“a = b + c;”鍓嶇璇嶆硶鍒嗘瀽鍣ㄧ湅鍒扮殑鏄?#8220;a, =, b , +, c;”錛岃娉曞垎鏋愬櫒鎸夊畾涔夌殑璇硶錛屽厛鎶婁粬浠粍瑁呮垚琛ㄨ揪寮?#8220;b + c”錛屽啀緇勮鎴?#8220;a = b + c”鐨勮鍙ャ?/span>鍓嶇榪樿礋璐h涔夛紙semantic checking錛夌殑媯鏌ワ紝渚嬪媯嫻嬪弬涓庤繍綆楃殑鍙橀噺鏄惁鏄悓涓綾誨瀷鐨勶紝綆鍗曠殑閿欒澶勭悊銆傛渶緇堢殑緇撴灉甯稿父鏄竴涓娊璞$殑璇硶鏍戯紙abstract syntax tree錛屾垨 AST錛夛紝榪欐牱鍚庣鍙互鍦ㄦ鍩虹涓婅繘涓姝ヤ紭鍖栵紝澶勭悊銆?/span>

緙栬瘧鍣ㄥ悗绔紙backend錛?/span>
 
緙栬瘧鍣ㄥ悗绔富瑕佽礋璐e垎鏋愶紝浼樺寲涓棿浠g爜錛?/span>Intermediate representation錛変互鍙婄敓鎴愭満鍣ㄤ唬鐮侊紙Code Generation錛夈?/span>

 
涓鑸鏉ユ墍鏈夌殑緙栬瘧鍣ㄥ垎鏋愶紝浼樺寲錛屽彉鍨嬮兘鍙互鍒嗘垚涓ゅぇ綾伙細鍑芥暟鍐咃紙intraprocedural錛夎繕鏄嚱鏁頒箣闂達紙interprocedural錛夎繘琛屻傚緢鏄庢樉錛屽嚱鏁伴棿鐨勫垎鏋愶紝浼樺寲鏇村噯紜紝浣嗛渶瑕佹洿闀跨殑鏃墮棿鏉ュ畬鎴愩?/span>

 
緙栬瘧鍣ㄥ垎鏋愶紙compiler analysis錛夌殑瀵硅薄鏄墠绔敓鎴愬茍浼犻掕繃鏉ョ殑涓棿浠g爜錛岀幇浠g殑浼樺寲鍨嬬紪璇戝櫒錛?/span>optimizing compiler錛夊父甯哥敤濂藉嚑縐嶅眰嬈$殑涓棿浠g爜鏉ヨ〃紺虹▼搴忥紝楂樺眰鐨勪腑闂翠唬鐮侊紙high level IR錛夋帴榪戣緭鍏ョ殑婧愮▼搴忕殑鏍煎紡錛屼笌杈撳叆璇█鐩稿叧錛?/span>language dependent錛夛紝鍖呭惈鏇村鐨勫叏灞鎬х殑淇℃伅錛屽拰婧愮▼搴忕殑緇撴瀯錛涗腑灞傜殑涓棿浠g爜錛?/span>middle level IR錛変笌杈撳叆璇█鏃犲叧錛屼綆灞傜殑涓棿浠g爜(Low level IR)涓庢満鍣ㄨ璦綾諱技銆?/span>涓嶅悓鐨勫垎鏋愶紝浼樺寲鍙戠敓鍦ㄦ渶閫傚悎鐨勯偅涓灞備腑闂翠唬鐮佷笂銆?/span>

 
甯歌鐨勭紪璇戝垎鏋愭湁鍑芥暟璋冪敤鏍戯紙call tree錛夛紝鎺у埗嫻佺▼鍥撅紙Control flow graph錛夛紝浠ュ強鍦ㄦ鍩虹涓婄殑鍙橀噺瀹氫箟錛嶄嬌鐢紝浣跨敤錛嶅畾涔夐摼錛?/span>define-use/use-define or u-d/d-u chain錛夛紝鍙橀噺鍒悕鍒嗘瀽錛?/span>alias analysis錛夛紝鎸囬拡鍒嗘瀽錛?/span>pointer analysis錛夛紝鏁版嵁渚濊禆鍒嗘瀽錛?/span>data dependence analysis錛夌瓑絳夈?/span>

 
涓婅堪鐨勭▼搴忓垎鏋愮粨鏋滄槸緙栬瘧鍣ㄤ紭鍖栵紙compiler optimization錛夊拰紼嬪簭鍙樺艦錛?/span>compiler transformation錛夌殑鍓嶆彁鏉′歡銆傚父瑙佺殑浼樺寲鍜屽彉鏂版湁錛氬嚱鏁板唴宓岋紙inlining錛夛紝鏃犵敤浠g爜鍒犻櫎錛?/span>Dead code elimination錛夛紝鏍囧噯鍖栧驚鐜粨鏋勶紙loop normalization錛夛紝寰幆浣撳睍寮錛?/span>loop unrolling錛夛紝寰幆浣撳悎騫訛紝鍒嗚錛?/span>loop fusion錛?/span>loop fission錛夛紝鏁扮粍濉厖錛?/span>array padding錛夛紝絳夌瓑銆?/span>浼樺寲鍜屽彉褰㈢殑鐩殑鏄噺灝戜唬鐮佺殑闀垮害錛屾彁楂樺唴瀛橈紙memory錛夛紝緙撳瓨錛?/span>cache錛夌殑浣跨敤鐜囷紝鍑忓皯璇誨啓紓佺洏錛岃闂綉緇滄暟鎹殑棰戠巼銆傛洿楂樼駭鐨勪紭鍖栫敋鑷沖彲浠ユ妸搴忓垪鍖栫殑浠g爜錛?/span>serial code錛夊彉鎴愬茍琛岃繍綆楋紝澶氱嚎紼嬬殑浠g爜錛?/span>parallelized錛?/span>multi-threaded code錛夈?/span>

 
鏈哄櫒浠g爜鐨勭敓鎴愭槸浼樺寲鍙樺瀷鍚庣殑涓棿浠g爜杞崲鎴愭満鍣ㄦ寚浠ょ殑榪囩▼銆傜幇浠g紪璇戝櫒涓昏閲囩敤鐢熸垚姹囩紪浠g爜錛?/span>assembly code錛夌殑絳栫暐錛岃屼笉鐩存帴鐢熸垚浜岃繘鍒剁殑鐩爣浠g爜錛?/span>binary object code錛夈傚嵆浣垮湪浠g爜鐢熸垚闃舵錛岄珮綰х紪璇戝櫒浠嶇劧瑕佸仛寰堝鍒嗘瀽錛屼紭鍖栵紝鍙樺艦鐨勫伐浣溿備緥濡傚浣曞垎閰嶅瘎瀛樺櫒錛?/span>register allocatioin錛夛紝濡備綍閫夋嫨鍚堥傜殑鏈哄櫒鎸囦護錛?/span>instruction selection錛夛紝濡備綍鍚堝茍鍑犲彞浠g爜鎴愪竴鍙ョ瓑絳夈?/span>


緙栬瘧璇█涓庤В閲婅璦瀵規瘮
 
璁稿浜哄皢楂樼駭紼嬪簭璇█鍒嗕負涓ょ被: 緙栬瘧鍨嬭璦鍜?/span>瑙i噴鍨嬭璦銆傜劧鑰岋紝瀹為檯涓婏紝榪欎簺璇█涓殑澶у鏁版棦鍙敤緙栬瘧鍨嬪疄鐜頒篃鍙敤瑙i噴鍨嬪疄鐜幫紝鍒嗙被瀹為檯涓婂弽鏄犵殑鏄偅縐嶈璦甯歌鐨勫疄鐜版柟寮忋傦紙浣嗘槸錛屾煇浜涜В閲婂瀷璇█錛屽緢闅劇敤緙栬瘧鍨嬪疄鐜般傛瘮濡傞偅浜涘厑璁?/span>鍦ㄧ嚎浠g爜鏇存敼鐨勮В閲婂瀷璇█銆傦級

chatler 2008-07-21 08:57 鍙戣〃璇勮
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